New technological innovations have made it possible for new intermediaries to create value in business processes that involve the procurement of manufacturing and services supplies. Associated with these innovations is the emergence of business-to-business (B2B) electronic markets. These act as digital intermediaries that aim to reduce the transaction costs and mitigate the risks inherent in procurement. They improve buyers’ capabilities to search for attractive prices and also serve to increase the liquidity of sellers’ products. In this chapter, the authors explore the evolution of B2B e-market firms in terms of the strategies they employ to “perfect” their value propositions and business processes for the firms. This is a critical aspect of their attractiveness as business partners for the buyers and sellers that participate in their electronic marketplaces. The key theoretical perspectives of this work are adapted from economics and strategic management. They enable the authors to construct a “partnering for perfection” theory of strategic alliances in e-procurement markets. This perspective is captured in a series of inquiries about “why” and “when” B2B e-markets are observed to form alliances. The authors carry out an innovative econometric analysis that delivers empirical results to show the efficacy of the theory in interpreting real world events. The chapter concludes with a discussion of the implications of this work in academic and managerial terms.